🤖Z.ai Launches Open Source GLM-5.3 API at $1.40/million Tokens
New Z.ai Model Costs Less Than Competitors, But With Caveats
TL;DR
Chinese startup z.ai launches open-source GLM-5.3 API with unchanged pricing from GLM-5.2: $1.40 per million input tokens, cheaper than many competitors. But beware of verbose responses that could increase costs.
Z.ai has launched its new open source language model, GLM-5.3, as an API for developers to build upon and integrate into their applications. The pricing remains the same at $1.40 per million input tokens and $4.40 per million output tokens, making it one of the more affordable options compared to competitors like GPT-5.6 Sol ($5.00/million input, $30.00/million output). However, GLM-5.3 is known for producing longer responses, which could lead to higher costs despite lower per-token prices. Developers should carefully consider their use cases before adopting this model.
Key Points
GLM-5.3 pricing: $1.40 per million input tokens, $4.40 per million output tokens; unchanged from GLM-5.2
Competitor GPT-5.6 Sol prices at $5.00/million input and $30.00/million output
GLM-5.3 is more verbose than its predecessor, increasing costs for completed workloads
Z.ai plans to release model weights openly but no date or licensing details yet
Cached input storage currently free with a cost of $0.26 per million tokens
Why It Matters
If you're building applications that rely on language models and are budget-conscious, GLM-5.3 offers an attractive price point. However, the model's verbosity means higher costs for larger workloads. Developers should weigh the benefits of lower token prices against potential increased usage fees.
Frequently Asked Questions
Why does this matter?
If you're building applications that rely on language models and are budget-conscious, GLM-5.3 offers an attractive price point. However, the model's verbosity means higher costs for larger workloads. Developers should weigh the benefits of lower token prices against potential increased usage fees.
What happened?
Chinese startup z.ai launches open-source GLM-5.3 API with unchanged pricing from GLM-5.2: $1.40 per million input tokens, cheaper than many competitors. But beware of verbose responses that could increase costs.
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